I am looking forward to reading two PT1000 temperature sensors. I am replacing an existing control unit. Therefore the PT1000 sensors are given. The wirings from the two measuring points to the control unit are also given.
I don't need a high-end resolution which could be assumed by using a PT1000. One digit after the comma is more than enough for my task. (24.x °C)
The unit is comparing both sensor values and performs two "if, else"-Statments if one or the other sensor is higher. I know this could be performed without using any kind of Arduino by hardware components only. But I would like to display the sensor values on a different station and collect historical data etc.
I hope this will give you some details about the project itself.
My question is quite easy:
Which "operational amplifier" shield can you recommend for my task? Instead of amps do you recommend max31865 setups? Is there any shield available that could connect up to two PT1000 sensors at once? I would prefer a ready-to-use Arduino shield. If this is not available, of course, I can solder it by myself. I found a max31865 shield for pt100 / 1000 which "just" needs to replace a SMD resistor. But this is quite challenge form me.
I am not quite sure yet, which wifi shield I would use either. This is why I would like to use a shield which is bypassing not-used PINs to the next shield.
I was wording if I I/O shield is maybe already serving what I am looking for?
Looking forward to any kind of help!
Thanks in advance!
Rob
You will find many sources of interface modules that will do the resistance conversion to temperature for you and allow more than one PT1000 to be connected.
Most modules are I2C interface, this means you can have two modules connected to the same two communication wires, but because they have a different address, you can communicate with each independently.
Hi @TomGeorge,
thanks for your quick reply and your warm welcome.
I agree using the correct keywords in google usually does help a lot. But this time this is not helping me finally. That is why I asked for a recommendation.
So let me try this in another way:
Do you think this one will work?
Hi,
That module has its own temperature sensor on board.
You need, from what I understand, modules to connect to your two PT1000 sensors and communicate with a controller.
You need this type of unit.
It will take your PT1000 and read and convert its value to a temperature value for you to read.
It uses SPI rather than I2C but will not require a large amount of interconnection.
Hi Tom!
Thanks for your link.
This device is the first one I found... but sadly out of stock for weeks.
I have one available for PT100. I will now try to change the SMD resistor. Maybe it will work.
